4-(4-Acethylphenyl)-3-hydroxycoumarin in the Synthesis of Nitrogen-containing Heterocycles with a Neoflavonoid Moiety
作者:P. I. Yagodinets、O. V. Rusnak、R. Z. Lytvyn、O. V. Skrypska、Kh. Ye. Pitkovych、M. D. Obushak
DOI:10.1134/s107042801908013x
日期:2019.8
2-a]pyridine, imidazo[1,2-a]pyrimidine, and imidazo[2,1-b]thiazole derivatives. The reactions of 4-(4-bromoacetylphenyl)-3-hydroxy-2H-chromen-2-one with thiosemicarbazide and aromatic aldehydes involve thiazole ring formation, leading finally to corresponding hydrazones. It was established that 4-(4-acetylphenyl)- and 4-[4-(2-bromoacetyl)phenyl]-3-hydroxy-2H-chromen-2-ones can be used in three-component reactions
在Meerwein反应下,通过(4-乙酰基苯)重氮氯化物与3-羟基-2 H-铬烯-2-酮的反应制备了4-(4-乙酰基苯基)-3-羟基-2 H-铬烯-2-酮。条件。4-(4-溴乙酰基苯基)-3-羟基-2 H-铬-2--2-酮与吡啶,4-甲基吡啶,喹诺酮和苯并[ f ]喹啉的反应生成季盐,以及该溴衍生物的反应与硫代乙酰胺,硫脲,吡啶-2-胺,嘧啶-2-胺和噻唑-2-胺一起提供相应的噻唑,咪唑并[1,2- a ]吡啶,咪唑并[1,2- a ]嘧啶和咪唑并[ 2,1- b ]噻唑衍生物。4-(4-溴乙酰基苯基)-3-羟基-2的反应与硫代氨基脲和芳族醛形成的H-铬-2-酮涉及噻唑环的形成,最终导致形成相应的azo。已确定4-(4-乙酰苯基)-和4- [4-(2-溴乙酰基)苯基] -3-羟基-2 H-铬-2--2-酮可用于三组分反应形成噻唑环。